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The total length of the horizontal thru-wall exhaust vent system should not exceed seventy (70) feet in length. If horizontal
run exceeds 70 feet, an appropriately sized extractor must be used. To maintain proper operation pressure reading must be
between -.01 to -.1 W.C. as measured 12 inches from the appliance flue outlet. Each elbow used is equal to ten (10) feet of
straight pipe. This will allow installation in one of the four following combinations.
· 70’ of straight flue pipe.
· 60' of straight flue pipe and one elbow.
· 50' of straight flue pipe and two elbows.
· 40' of straight pipe and three elbows.
The vent cap is not considered in the overall length of the venting system.
The vent must be installed to prevent the flue gas leakage. Care must be taken during assembly to insure that all joints are
sealed properly and are airtight.
The vent must be installed to prevent the potential accumulation of condensate in the vent pipes. It is recommended that:
a) The vent be installed with a slight downward slope of not more than 1/4" per foot of horizontal run to the vent terminal.
b) The vent be insulated through the length of the horizontal run.
For appliances installed in extreme cold climate, it is recommended that:
a) The vent be installed with a slight upward slope of not more than 1/4" per foot of horizontal run to the vent terminal. In
this case, an approved condensate trap must be installed per applicable codes.
b) The vent be insulated through the length of the horizontal run.
A sleeve has been added inside the flue box of all Hi Delta heaters, as a redundant heat insulator to eliminate internal
condensation. It is to be removed
only when the application calls for venting through the rear of the unit.
To remove sleeve, remove the rear exhaust cover panel and lift sleeve upward. Note: The sleeve is not mechanically
attached, and will lift upward with a rocking motion. Use a knife or razor blade to cut through and loosen the RTV
sealant.
HI DELTA SLEEVE FLUE CONVERSION
32
Fig. #9436